Closure cap for disposable hypodermic syringes



, 1968 w. A. SHIELDS June 11 CLOSURE CAR FOR DISPOSABLE HYPODERMICSYRINGES 6 m w I z m w 4 F 3 2 1"!!"4 J a 5 s a ///l m G G 1 Fill/fl m l.l 717 A d ATTORNE INVENTOR WALTER A. SHIELDS United States Patent3,387,609 CLOSURE CAP FOR DISPGSABLE HYPODERMKC SYRHNGES Walter A.Shields, 38-09 24th St, Jamaica, NY. 11101 Filed Jan. 19, 1966, Ser. No.523,839 3 Claims. (Cl. 128-218) ABSTRACT OF THE DISCLOSURE A disposablehypodermic syrin e comprising a vial having a beaded mouth and lip and aclosure consisting of a diaphragm including a peripheral flange, a hatintermediate portion extending inward and contacting said lip and outerportion engaged in the filler opening.

The diaphragm is retained by a closure cap having a depending skirtcrimped to said beaded mouth and has an inner annular crown withsurfaces abutting the flange and inter-mediate portion against the mouthof the vial.

This invention relates to a disposable syringe embodying a vialcontaining a liquid medicament, a hypodermic needle secured in one endof the vial and a plunger closing the opposite end of the vial andoperative to expel the liquid medicament from the vial through thehypodermic needle.

It is an object of the present invention to improve the diaphragm andclosure cap of my co-pending application for patent filed Mar. 23, 1964,under Ser. No. 353,666, whereby the closure cap and diaphragm co-operateto prevent material of the diaphragm buckling which will prevent itsproper functioning when the plunger is actuated to expel the liquidmedicament and the diaphragm is flexed to be punctured by the hypodermicneedle.

Other objects and advantages of the invention will be set forth in thedetailed description of the invention.

In the drawing accompanying and forming a part of this application:

FIGURE 1 is my new improved disposable syringe partly in section inshipping or storage condition and showing in broken lines the medicamentdischarging position of the plunger;

FIGURE 2 is a fragmentary sectional view in elevation and on an enlargedscale of my improved closure cap and diaphragm with the diaphragm invial sealing position;

FIGURE 3 is a view similar to FIGURE 2 showing the plunger in medicamentdischarging position and the diaphragm punctured by the hypodermicneedle to permit discharge of the medicament through the hypodermicneedle;

FIGURE 4 is a top plan view of the diaphragm; and

FIGURE 5 is an exploded View in section of the closure cap, diaphragmand filler mouth of the vial.

The embodiment of the invention is used in conjunction with a vial 6 oftransparent material, such as glass or the like, having both ends openand the opening in one end being substantially of the same diameter asthe diameter of the vial, as shown at 7 in FIGURE 1, and closed by aplunger 8 of resilient material; such as rubber, and havingliquid-sealing rings 9 to contact the inner surface of the vial andpermit sliding movement of the plunger 8 in the vial 6. The plunger 8 isprovided with a screw-threaded stud 10 projecting from the exposed endof said plunger and into the open end 7, as shown in FIG- URE 1, forconnecting the plunger 8 with a manipulating member comprising a rod 11having a screw-threaded recess 12 in one end for engagement with saidscrewthreaded stud 10 and a manipulating knob 13 at the op "ice positeend. The manipulating member is not attached to the plunger when thesyringe is shipped or stored.

After the plunger 3, without the manipulating member 11-13 attachedthereto, is properly positioned in the open end 7 of the vial 6, saidvial is filled with a liquid medicament m through the opposite end ofthe vial. Said opposite end of the vial is provided with a neck portion14 having a beaded mouth 1'5. The neck portion 14 is provided with afiller opening 20 which is sealed by a diaphragm of resilient andpenetrable material, such as rubber or composition, and comprising anannular peripheral flange 16 extending vertically from a flatintermediate annular portion 17 having the inner circumference connectedto a depressed portion 18 arranged with a concavo-conve-x bottom wall19. The diaphragm is applied to the beaded mouth 15 with theundersurface of the flange 16 and the flat portion 17 contacting the lipof said mouth and the depressed portion 18 extending into and sealin thefiller opening 20 of the vial.

The diaphragm is clamped to the mouth 15 by a closure cap of metal orother suitable material having an annular skirt 21 depending from acrown 22 arranged with a tubular portion 23 having a bore extendingthrough the crown to a central cavity 24 in the closure cap. Ahypodermic needle 25 having two penetrating ends 26 and 26' is mountedin the bore of the tubular portion 23 with one penetrating end 26projecting exteriorly of the tubular portion 23 and the otherpenetrating end 26 extended beyond the cavity 24. An annular ridge 27circumscribes the cavity 24 and is spaced from the skirt 21 to form anannular groove 28 for the reception of the annular flange 16 of thediaphragm. The closure cap is secured to the beaded mouth 15 by crimpingthe skirt 21 under said beaded mouth with the ridge 27 compressing theflat diaphragm portion 1'7 against the lip of the beaded mouth 15. Thediaphragm depressed portion 18 and the closure cap cavity 24 form asealed compartment 29 for the inner penetrating end 26 of the needle 25.

When the syringe is stored or shipped, the outer penetrating end 26 ofthe needle 25 is protected by a shield 3i) mounted on the tubularportion 23 of the closure cap, as shown in FIGURE 1.

When it is desired to use the syringe, the shield 30 is removed and themanipulating member 11-13 is attached to the plunger.

When the plunger 8 is pushed into the vial 6, the pressure created bythe liquid medicament m will flex the depressed portion 18 into thecavity 24 and cause the penetrating end 26 of the needle 25 to penetratesaid depressed portion and permit the discharge of the liquid medicamentthrough the needle 25.

The diaphragm flange 16 and the closure ca'p ridge 27 co-operate toanchor the peripheral portion of the diaphragm to the lip of the beadedmouth 15 and prevent the material of the depressed portion 18 frombuckling and assure the depressed portion to be in proper shape to bereversed or flexed by the hydraulic pressure of the liquid medicamentcaused by the inward movement of the plunger 8.

Having thus described my invention, I claim:

1. A disposable syringe comprising a vial having a filler openingarranged with a beaded mouth having a lip, a diaphragm closing saidfiller opening and including a peripheral flange, a flat intermediateannular portion extended inwardly from the lower section of the flange,the bottom surfaces of the flange and intermediate portion contactingthe lip of the mouth of the vial and a center portion connected to thebottom of the inner circumference of the intermediate portion andengaged in the filler opening of the vial, and a closure cap having adepending skirt crimped to the beaded mouth of the vial and a crownarranged with inner surfaces abutting the flange and intermediateportion against the lip of the mouth the vial.

2. A disposable syringe comprising a vial having a filler openingarranged with a beaded mouth having a lip, a diaphragm of flexiblematerial having a flange extending from the upper surface of theperipheral portion of the diaphragm, a horizontal intermediate annularportion and a central depressed portion extended from the intermediateannular portion in a direction opposite to the direction in which theflange extends from the peripheral portion of the diaphragm, thediaphragm being positioned on the lip of the beaded mouth with theflange extending upward and the depressed portion sealing the tilleropening, and a closure cap having a depending skirt crimped under thebeaded mouth and a crown provided with an annular ridge spaced from theskirt to form an annular groove for the reception of the diaphragmflange with said ridge compressing the horizontal intermediate annularportion of the diaphragm at a point spaced outwardly from the centraldepressed portion to permit a flexing movement of said central depressedportion toward the crown of the closure cap.

3. A disposable syringe comprising a vial having a filler openingarranged with a beaded mouth having a lip, 21 diaphragm of flexiblematerial closing the filler opening and including an annular flangeextending from the peripheral portion of the diaphragm, a flatintermediate annular portion extending inwardly from the flange and acentral depressed portion extended from the inner circumference of theintermediate portion and having a concavo-convex bottom wall, thediaphragm being positioned on the lip of the mouth of the vial with theflange extending upwardly, the flat portion engaging the lip of themouth of the vial and the depressed portion extending into the filleropening, and a closure cap having an annular depending skirt crimpedunder the beaded mouth of the vial and a crown having an annular ridgespaced inwardly from the skirt to engage the fiat portion of thediaphragm in contiguous relation with the flange of the diaphragm and acentral cavity within the ridge and forming a sealed compartment withthe depressed portion of the diaphragm, and a hypodermic needle carriedby the closurecap with one end projected exteriorly of the closure capand the opposite end positioned within said compartment adjacent to thedepressed portion of the diaphragm, whereby said depressed portion ispunctured by said end of the needle during the upward flexing movementor the depressed portion caused by pressure within the vial.

References Cited UNITED STATES PATENTS 2,847,996 8/1958 Cohen et a1128--218 3,028,033 4/1962 Geddes 215-40 3,084,688 4/1963 McConnaughey1282l8 2,251,527 8/1941 Smith 128-218 2,829,790 4/ 1958 Isele-Aregger21540 3,122,253 2/1964 Hagmann et al 2l540 3,122,254 2/ 1964- Hagmann etal 21540 FOREIGN PATENTS 1,401,450 4/1965 France.

RICHARD A. GAUDET, Primary Examiner. D. L. BAKER, M. F. MAJESTIC,Assistant Examiners.

